huntrule

Suspicious Active Directory Reconnaissance via In-Memory Offensive PowerShell (via ps_script)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
ps_script
Author
HuntRule
Published
2026-10-28
Updated
2026-10-28
AnalysisDetection

ATT&CK techniques

Discovery → Lateral Movement

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule detects execution of offensive PowerShell tooling used by Weaver Ant for lateral movement and Active Directory reconnaissance, including an SMB client and domain enumeration functions loaded in memory. These function names correspond to SharpView and SMB client tradecraft rather than standard administration.

Reporting behind it

Related detections9 linkedT1021.002 — drag to rearrange
Windows Process Creation: Execution of Net.exe or Net1.exe
Suspicious NetExec Post-Exploitation Tool Execution via nxc (via process_creation)
Suspicious Active Directory Export via Csvde via Process Creation (via process_creation)
Suspicious AdFind Domain User Reconnaissance Output
Suspicious SMB Admin Share Mapping for Lateral Tool Transfer (via process_creation)
Suspicious Impacket Remote Execution Tool Usage via process_creation
Suspicious Active Directory Reconnaissance Output via ADRecon CSV (via file_event)
Suspicious Domain Computer Enumeration via Net Group Command
Suspicious Remote Service Execution via PsExec (via process_creation)
Suspicious Active Directory Reconnaissance via In-Memory Offensive PowerShell (via ps_script)
Pivot detection · T1021.002 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.